Prediction model for the compressive strength of green concrete using cement kiln dust and fly ash

Abstract

Integrating artificial intelligence and green concrete in the construction industry is a challenge that can help to move towards sustainable construction. Therefore, this research aims to predict the compressive strength of green concrete that includes a ratio of cement kiln dust (CKD) and fly ash (FA), then recommend the optimum sustainable mixture design. The artificial neural network (ANN) and multiple linear regression techniques are used to build prediction models and statistics using MATLAB and IBM SPSS software. The input parameters are based on 156 data points of concrete components and compressive strengths that are collected from the literature. The developed models have been trained, validated, and tested for each technique. TOPSIS method is used to assign the optimum mixture design according to three sustainable criteria: compressive strength, carbon dioxide (CO2) emission, and cost. The results of ANN models showed a better prediction of the compressive strength with regression (R) equal to 0.928 and 0.986. The optimum mixture includes CKD 10–20% and FA 0–30%. Predicting the compressive strength of green concrete is a non-destructive approach that has sustainable returns including preservation of natural resources, reduction of greenhouse gas emissions, cost, time, and waste to landfill as well as saving energy.

Circular economy strategy for the valorization of fly ash as a substitute for cement in monoliths (resistance and reactivity evaluation)

“…Similarly, the use of glass as an added material for the manufacture of mortars also achieves economic and environmental benefits. Calculating these economic advantages is important because the construction industry is a changing economic sector that is always looking for better quality and more adequate prices 94 . For this reason, it is necessary to make an approximate calculation of how much the savings would be on a small scale from the use of this type of material for the manufacture of mortars.…”

“…Calculating these economic advantages is important because the construction industry is a changing economic sector that is always looking for better quality and more adequate prices. 94 For this reason, it is necessary to make an approximate calculation of how much the savings would be on a small scale from the use of this type of material for the manufacture of mortars. According to NTC 220, the number of materials to be used for the elaboration of nine test cubes should be as follows (Table 4):…”

Machine learning base models to predict the punching shear capacity of posttensioned UHPC flat slabs

“…Bakhoum et al 22 validated an ANN model to predict the concrete compressive strength achieving sustainable criteria including compressive strength, carbon dioxide and cost. As the proposed concrete contains proportions of cement kiln dust and fly ash.…”

Wood Ash as Sustainable Alternative Raw Material for the Production of Concrete—A Review

“…The predominant type of cement used in concrete production is Portland cement, which is primarily composed of clinker produced by burning limestone in cement plants. This process, known as calcination, decomposes CaCO 3 into CaO and CO 2 , resulting in significant greenhouse gas emissions [ 5 , 6 , 7 ]. The global cement enterprise contributes about 5–8% of carbon dioxide emissions to the atmosphere [ 8 , 9 ].…”

“…Nevertheless, some concerns exist regarding these applications of wood ash. Firstly, it is predicted that costs will increase due to difficulties in finding a landfill area in the future [ 7 , 19 ]. In addition, landfilling of wood ash may cause the leaching of hazardous elements and may cause contamination of groundwater [ 20 ].…”